Transcript
Rohde & Schwarz products:
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Universal Radio Communication Tester R&S CMU200, Signal Analyzer ® ® ® ® R&S FSQ, Spectrum Analyzers R&S FSU, R&S FSP and R&S FSL, Sig® ® ® nal Generators R&S SMU200A, R&S AMU200A, R&S SMJ100A, ® ® R&S SML and R&S SMR
Tests on CDMA2000® 1xEV-DO Access Terminals in Accordance to IS-866-A Tests with combined instruments
Application Note 1MA123 ®
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The Universal Radio Communication Tester R&S CMU200 can perform most of the CDMA2000 1xEV-DO access terminal (AT) tests specified in the standard IS-866-A on its own. Some tests require additional instruments. This application note shows how to perform these tests easily with the remote-control software ® ® ® ® ® CMUgo, using the R&S CMU200 in combination with R&S SMU, R&S AMU, R&S SMJ or R&S SML sig® ® ® ® ® nal generators, and R&S FSQ, R&S FSU, R&S FSP, R&S FSL or R&S FSMR spectrum analyzers.
Subject to change – Ottmar Gerlach, April 2009 - 1MA123_1e
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Additional Tests on CDMA2000 1xEV-DO Access Terminals
Contents 1 Overview ................................................................................................. 3 2 CMUgo: Operating Principles.................................................................. 4 System Requirements........................................................................ 5 Installation of CMUgo......................................................................... 5 Configuring the GPIB settings............................................................ 5 Measuring the Path Losses................................................................ 7 3 Receiver Tests ........................................................................................ 8 3.2 Demodulation Requirements ...................................................... 8 3.2.2 Demodulation of Forward Traffic Channel in Multipath Fading Channel........................................................................... 10 Generic Test Item, Subtests, Sequences ................................... 13 Test Procedure ........................................................................... 14 3.3 Receiver Performance .............................................................. 20 3.3.2 Single Tone Desensitization.............................................. 20 3.3.3 Intermodulation Spurious Response Attenuation.............. 25 3.3.4 Adjacent Channel Selectivity............................................. 31 3.3.5 Receiver Blocking Characteristics .................................... 36 3.4 Limitations on Emissions .......................................................... 41 3.4.1 RX Conducted Spurious Emissions .................................. 41 4 Physical Layer Transmitter Minimum Standards................................... 46 4.4 Limitations on Emissions .......................................................... 46 4.4.1 TX Conducted Spurious Emissions .................................. 46 4.4.3 Occupied Bandwidth ......................................................... 51 5 Summary............................................................................................... 56 6 References............................................................................................ 56 7 Ordering Information ............................................................................. 57
The following abbreviations are used in this application note for Rohde & Schwarz test equipment:
The Universal Radio Communication Tester R&S®CMU200 is referred to as the CMU.
The Vector Signal Generator R&S®SMU200A is referred to as the SMU.
The Baseband Signal Generator R&S®AMU200A is referred to as the AMU.
The Vector Signal Generator R&S®SMJ100A is referred to as the SMJ.
The Signal Generator R&S®SML is referred to as the SML.
The Signal Generator R&S®SMR is referred to as the SMR.
The Signal Generator R&S®FSL is referred to as the FSL.
The Spectrum Analyzer R&S®FSP is referred to as the FSP.
The Spectrum Analyzer R&S®FSU is referred to as the FSU.
The Signal Analyzer R&S®FSQ is referred to as the FSQ.
The Signal Analyzer R&S®FSMR is referred to as the FSMR.
The R&S logo, Rohde & Schwarz, and R&S are registered trademarks of Rohde & Schwarz GmbH & Co. KG and its subsidiaries. CDMA2000® is a registered trademark of the Telecommunications Industry Association (TIA -USA).
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1 Overview ®
Most of the tests specified in the standard IS-866-A that a CDMA2000 1xEV-DO access terminal (AT) has to fulfill can be performed by the Uni® versal Radio Communication Tester R&S CMU200 without further assistance. Other tests, however, require additional instruments, for instance for generating interfering signals. Some tests of the standard IS-866-A need features that a tester optimized for production cannot offer, for example high dynamic spectrum analysis up to 12.75 GHz. This Application Note shows how to perform these tests easily with the remote-control software ® CMUgo, using the R&S CMU200 in combination with Vector Signal Gen® ® ® erators R&S SMU, R&S SMJ or Signal Generator R&S SML, Baseband ® ® Signal Generator R&S AMU200A and Spectrum Analyzers R&S FSQ, ® ® ® ® R&S FSU, R&S FSP, R&S FSL or R&S FSMR. New test items and sequences have therefore been added in the CMUgo software to control the ® R&S CMU200 as well as the signal generators and spectrum analyzers remotely. These predefined settings are an integral part of CMUgo from ® version 1.9.8 on. This expands the list of the CDMA2000 1xEV-DO AT ® measurements already implemented in the R&S CMU200 firmware by the following tests (the leading number is the corresponding section number of the test in the standard IS-866-A): 3 Physical Layer Receiver Minimum Standards 3.2
Demodulation Requirements
3.2.2
Demodulation of Forward Traffic Channel in Multipath Fading Channel
Receiver tests under static conditions: 3.3
Receiver Performance
3.3.2
Single-Tone Desensitization
3.3.3
Intermodulation Spurious Response Attenuation
3.3.4
Adjacent Channel Selectivity
3.3.5
Receiver Blocking Characteristics
3.4.1
Conducted Spurious Emissions
Transmitter tests: 4.4
Limitations on Emissions
4.4.1
Conducted Spurious Emissions
4.4.3
Occupied Bandwidth
For each of the tests mentioned above, this application note gives you a short overview of the test itself, a recommended hardware setup, predefined test sequences, and step-by-step instructions on how to perform this test using the CMUgo software. Measurement results obtained with these predefined sequences complete the presentation of each test.
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2 CMUgo: Operating Principles CMUgo is a software tool for running remote-control tests using the CMU200 and additional instruments. CMUgo provides a large number of essential test items of a measurement, such as 1XEV-DO SINGLE-TONE DESENSITIZATION, 1XEV-DO ADJACENT CHANNEL SELECTIVITY, 1XEV-DO BLOCKING TEST, 1XEV-DO RX SPURIOUS EMISSIONS, 1XEV-DO TX SPURIOUS EMISSIONS and 1XEV-DO OCCUPIED BANDWIDTH. To set up a complete test, you need in addition some more general test items: BASIC INITIALIZING, 1XEV-DO CALL SETUP, 1XEV-DO CALL RELEASE, and TEST END (to display a summary result). Use these test items as building blocks to create your own test sequences. For the seven tests mentioned above, there are predefined test sequences included in CMUgo from version 1.98. The examples refer to band class 0 (BC 0), but can be easily switched to other band classes as well. With this support, your operating procedure will always be as follows:
Load a predefined test sequence.
Adapt the parameters to your application and enter the path losses of your test setup (see section below).
Save your test sequence for later use.
Run the test.
All predefined sequences include in their name the section number of the test in the standard IS-866-A. For example, load sequence 1XEVDO_3.2.2.SEQ for the DEMODULATION OF FORWARD TRAFFIC CHANNEL IN MULTIPATH FADING CHANNEL test described in section 3.2.2 of IS-866-A. It is presumed that you are already familiar with the CMU200 and CMUgo. Otherwise first read the manual CMUGO.PDF, which is extracted to a custom folder during installation. It describes the menus, the entries and the controls, and provides examples. We encourage you to learn as you go. Familiarize yourself with the CMUgo software. Note:
Read section 3.2.2 DEMODULATION OF FORWARD TRAFFIC CHANNEL MULTIPATH FADING CHANNEL first, since details on the complete measurement are given there and not repeated in the description of the other tests. IN
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System Requirements To ensure proper operation of CMUgo, your computer shall fulfill the following minimum requirements: Platform: Windows XP / Vista Processor: Pentium V RAM: 256 MBytes Display: SVGA 800x600 pixels Hard-disk storage: 50 Mbytes Peripherals: Mouse National Instruments GPIB controller CMU200 firmware version ³ 4.5.2.
Installation of CMUgo Application Note 1MA123 consists of two parts:
The CMUgo software (file CMUgo.zip)
This document (1MA123_xe.pdf)
Download it from http://www.rohde-schwarz.com/appnote/1MA123 Unzip CMUgo.zip, run SETUP.EXE and follow the instructions in the installer dialog.
Configuring the GPIB settings CMUgo is used here as a tool to remote-control the CMU200 and other instruments via the GPIB bus. All devices should be set to different IEEE addresses, and have to be connected via the GPIB bus to your controller where CMUgo is running. (To keep the setup figures simple, GPIB interfacing has been omitted in those figures on the following pages.)
Run CMUgo.
Click CONFIGURATION
The port for remote control of the CMU200 can be configured at REMOTE PORT. In addition, CMUgo can control up to ten additional AUXILIARY GPIB PORTS:
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Fig. 2_1 GPIB Configuration for up to ten additional instruments
Double-click one of the auxiliary GPIB ports to make a device known to CMUgo.
The configuration window for this port opens (see Fig. 2_2).
Enter a device name you wish to use. Always use the same device names and spellings that you use later in the test items. We recommend 'FSx' for any analyzer (FSQ, FSU, FSP, FSL or FSMR), 'SMx' for any CW generator (SMU, SMJ, SMR or SML), 'SMR' for SMR, and 'SMU' for SMU exclusively.
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Enter the GPIB address.
Enable port (do not omit this step!).
Repeat this procedure for the other devices.
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Fig. 2_2 Configuration of Auxiliary GPIB Port, Enable Port checkbox
Measuring the Path Losses For each test you will find a recommended hardware setup in this application note. Even if you work with the same components, your setup will have its own characteristic that depends, for example, on the lengths and types of your cables. Before running any test, measure the actual path losses of your hardware setup. Use the same frequencies that are used later in the test. Enter the measured values as INPUT or OUTPUT ATTENUATION when you edit a test sequence. The losses will thus automatically be compensated by the software. We recommend the Rohde & Schwarz application program FreRes as a helpful tool for measuring frequency response. FreRes is part of Application Note 1MA09, which you can download free of charge at http://www.rohde-schwarz.com/appnote/1MA09 Note:
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For measurements below 10 MHz, set the analyzer to input DC.
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3 Receiver Tests The tests in this chapter are performance related and simulate real world influences such as moving access terminals (AT) with multipath fading models or disturbances by neighboring access networks (AN) by adding AWGN (Additive White Gaussian Noise). The following section numbers correspond to the numbers used in IS-866-A
3.2 Demodulation Requirements The receiver tests in multipath fading channel show how well the mobile ® station demodulates a CDMA2000 1xEV-DO traffic channel under realistic propagation conditions. Unlike other tests using static signals, the RF input at the mobile antenna changes over time as if the access terminal were moving and received the forward signal simultaneously via different reflections. Fig. 3.2_1 shows a car with a mobile radio installed, driving in a typical urban situation. You see some (of many) routes a Node B transmitter signal takes at this point to reach the antenna on the car. Since the car is moving, the routes may be completely different an instant later.
Fig. 3.2_1 Typical multipath condition in the city for a mobile radio installed in a car.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Reflected signals differ in attenuation and length (delay). We will call a set of routes with nearly the same delay one "path". The yellow lines in Fig. 3 belong to one path, the white lines to another. If there is no direct line of sight between Node B and the mobile station, the sum of the reflected signals of one path represents a "Rayleigh" fading profile. Each mobile standard defines its own characteristic fading profiles. During a test, the stipulated profile is calculated inside a channel simulator in realtime. Measurements can thus be repeated at any time, providing the same results. The ® standard IS-866-A stipulates the following five CDMA2000 1xEV-DO fading profiles (channel simulator configurations):
Measure the performance of the mobile station in multipath fading in the same way as in non-fading receiver tests. Apply a forward signal with predefined channel configuration and RF level, and check the Frame Error Rate (FER) or the Bit Error Rate (BER) for each frame category (data rate) supported by the mobile station.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 3.2.2 Demodulation of Forward Traffic Channel in Multipath Fading Channel The section 3.2.2 of standard IS-866-A is about "demodulation of the forward traffic channel in multipath fading" conditions. Since all of these tests use the same hardware configuration and only differ in their parameters, they are discussed together in this section. Fig. 4 shows the functional hardware setup for the fading tests as outlined in the standard, using an RF fading channel simulator. AWGN generator Ioc TX
Base station
Ior
Channel simulator
Îor
RX
Io
Mobile station under test
Fig. 3.2.2_1 Setup for fading tests in the standard IS-866-A.
The RF channel simulator transforms the static level TX signal Ior into the fading signal Îor. An AWGN generator adds white noise Ioc to simulate other non-1xEV-DO channels. Io is the signal summary at the antenna of the mobile station under test. In this application note, the fading profiles and AWGN are generated in the baseband.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Recommended test setup: ®
Fig. 5 shows the hardware setup for CDMA2000 1xEV-DO fading tests ® with an SMU. The CMU200 generates the CDMA2000 1xEV-DO forward channel in the baseband and provides it at the IQ outputs of the option CMU-B17. This signal is fed to the baseband inputs of the SMU generator. Inside the SMU, fading profiles are applied and AWGN is added. Then the signal is returned from the SMU baseband outputs to the IQ inputs of the option CMU-B17, and up-converted into the RF band. For connecting the instruments, the option CMU-B17 includes a dedicated cable with a DSUB connector to the CMU200 and BNC connectors to the SMU. The CMUgo software also supports RX Diversity. If you are not sure if the AT has a 50 terminated RX diversity input, use a 20 dB attenuator to avoid damage of the SMU output by reflected power.
RX-Diversity RF Path
Access Terminal (AT)
20dB Att 20
Fig. 3.2.2_2 Hardware setup for 1xEV-DO® fading tests.
Instruments and accessories: CMU200 including CMU-B17
I/Q-IF interface
SMU incl. options SMU-B13
Baseband main module
SMU-B14, B15 Fading Simulator SMU-B17
Baseband Input
SMU-K62
AWGN
Path loss compensation: Measure the RF cable loss between the access terminal (AT) and the CMU200 and the AT and SMU. Then procede as decribed in the following section Configure test item 1XEV-DO FADING. 1MA123
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Fading path: Fig. 3.2.2_3 illustrates the signal processing in the baseband, displayed on the SMU generator screen. Inside the SMU, only the blue blocks are active. The IQ input signals are fed into the baseband block Fading A and B, where the requested profiles are generated. Afterwards they are sent to the AWGN / Impairment block, which adds the white noise.
Fig. 3.2.2_3 Functional signal processing inside the SMU.
In the baseband path, the levels vary several times; see Fig. 3.2.2_4:
CMU200 AWGN
SMU Ioc CMU-B17 IQ Out
Îor
Ior
CMU-B17 IQ In
Io
Fading simulator
Att.
Ampl.
Insertion loss
RF generation
Mobile AT station
Fig. 3.2.2_4 Level variation in the fading path. ®
Due to the high crest factor of CDMA2000 1xEV-DO signals, the average level at the CMU baseband outputs is already reduced in the CMU-B17 before reaching the SMU inputs. If the checkbox SMU BASEBAND INPUT CALIBRATION in the multipath test item is enabled (see Fig. 3.2.2_3), the SMU measures the level at its IQ inputs. The attenuation ATT. in Fig. 3.2.2_4 is the difference between full scale and the measured level. To
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Additional Tests on CDMA2000 1xEV-DO Access Terminals avoid clipping, the fading simulator further reduces the baseband level. This attenuation is called INSERTION LOSS in Fig. 3.2.2_4.
The SMU knows both attenuations, and adjusts the actual internal AWGN level automatically to maintain the required ratio Îor / Ioc.
Whereas the level attenuation ATT in the CMU-B17 output block is compensated by an amplifier inside the CMU-B17 input block, the INSERTION LOSS in Fig. 3.2.2_4 is not yet taken into account. If no measures are taken, the RF output of the CMU200 would be too low. The test item 1XEVDO FADING copes with this by simulating a higher output attenuation for the CMU200. The INSERTION LOSS is added to the RF CABLE LOSS, and the CMU raises its level accordingly.
Generic Test Item, Subtests, Sequences The tests for section 3.2.2 of the IS-866-A standard all use the same hardware setup and one common generic test item 1XEVDO FADING. To set up the channel configuration use the test item 1XEVDO CALL SETUP. Furthermore, the tests differ in their power control configuration; set this up in the test item 1XEVDO FADING. Perform the measurements for each band class the mobile station supports. Each of the four sections contains a number of subtests (single measurements) with a specific combination of parameters for the level ratios, the data rates, and the fading simulator configurations. For each subtest, a parameter set is preprogrammed in the test item 1XEVDO FADING. In addition, CMUgo provides a predefined test sequence for 3.2.2. From the CMUgo user's point of view, the multipath tests are handled in the same way as tests with static RF level:
Load a predefined test sequence.
Adapt the parameters to your application and enter the path losses of your test setup (see section below).
Save your test sequence for later use.
Run the test.
For tests of section 3.2.2 use the following sequence: 1XEVDO 3.2.2.SEQ runs the tests 2, 5, 7 and 8 of section 3.2.2. Use this sequence as an example, and modify the parameters as required by your application.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Test Procedure 1)
Connect instruments and mobile station as shown in Fig. 3.2.2_2.
2)
Run CMUgo, and then click CONFIGURATION CONFIGURE TESTS.
The CONFIGURE TEST window opens. 3)
Click LOAD SEQUENCE, and select 1XEVDO 3.2.2 T1-T3 C1.SEQ.
Fig. 3.2.2_5 Available and selected test items (test sequence) for the demodulation of forward traffic channel in multipath fading channel test
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test item BASIC INITIALIZING: 1)
Double-click the test item BASIC INITIALIZING. The configuration window opens (see Fig. 3.2.2_6). It shows which function groups could be available inside the CMU200.
2)
Always enable the function groups RF and 1xEVDO.
Fig. 3.2.2_6: Available function groups inside CMU200
Table 3.2.2_1 shows which CMU200 option is necessary for each band class: BC0, BC2, BC3, BC7, BC9, BC10
1xEV-DO Cellular Band
CMU-K849 option
BC1, BC4, BC8
1xEV-DO PCS Band
CMU-K859 option
BC5
1xEV-DO 450 MHz
CMU-K839 option
BC6
1xEV-DO IMT2K Band
CMU-K869 option
Table 3.2.2_1: Band classes and CMU function groups.
3)
Select the correct function group for your application.
Note:
4)
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If you enable SHOW CMU REPORT SCREEN, the CMU monitors all GPIB commands from and to your remote controller. Otherwise the CMU screen will be blank.
Click OK.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test item 1XEV-DO CALL SETUP: 5)
After double-clicking 1XEVDO CALL SETUP in the list of the selected test items the window 1xEVDO CALL SETUP CONFIGURATION opens.
Fig. 3.2.2_7 Call setup configuration for demodulation of forward traffic channel in multipath fading channel tests. .
6)
Select the NETWORK corresponding to the band class (BC) of your mobile station.
7)
Select the according physical layer SUBTYPE 0 or SUBTYPE 2.
8)
Enter a channel number for the call setup at PHYSICAL RF CHANNEL.
9)
Enter the path loss you measured between the AT and the CMU200 as ATTENUATION IN and ATTENUATION OUT.
You may modify the other parameters if necessary. 10) After clicking OK you return to the CONFIGURE TEST window (Fig. 3.2.2_5): Configure test item 1XEVDO FADING: 1)
Double-click 1XEVDO FADING in the list of the selected test items.
The 1XEV-DO FADING window appears (see Fig. 3.2.2_8).
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Fig. 3.2.2_8 The generic 1xEV-DO Fading window for demodulation in multipath fading.
2)
Select your BAND CLASS (NETWORK).
3)
Select a TEST.
Once the bandclass and a test are selected most of the parameter entries in the window above are preset with predefined values from standard IS866-A such as the signal parameters Îor/Ioc, DATA RATE, CHANNEL SIMULATOR CONFIGURATION, and the PER LIMIT (Packet Error Rate). If you modify one or more of these parameters, USER DEFINED will be checked. Listed below are some remaining parameters: 4)
Enter the MIN.CONFIDENCE LEVEL and the MAXIMUM TEST PACKETS.
5)
Optionally enter Pause before measurement (time span between configuration and measurement). Default 0 seconds.
6)
Enter the RF CHANNEL.
7)
Enter the path loss you measured between the AT and the CMU200 as CABLE LOSS DL and UL.
8)
Enter the path loss you measured between the AT and the SMU200 as SMU CABLE LOSS DL.
9)
Enable RX DIVERSITY if desired. The SMU PATH DELAY is set to 1.25 µs by default and compensates the delay between the CMU and SMU RF output.
10) Enable the SMU BASEBAND INPUT CALIBRATION checkbox in the item 1XEV-DO FADING which follows immediately after 1XEV-DO CALL SETUP in your test sequence. The SMU will then measure the incoming baseband signal and adjust the AWGN correctly. This calibration must be performed each time when IOR / IOC or the CHANNEL SIMULATOR CONFIG is changed. The SMU may optionally perform a PRESET. 11) Optionally add a comment in the DESCRIPTION field. 1MA123
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 12) After clicking OK you return to the CONFIGURE TEST window (Fig. 3.2.2_5). 13) Configure another item and create your own sequence, if necessary. You may want to store your sequence. Use the SAVE SEQUENCE button in the CONFIGURE TEST window (see Fig. 3.2.2_5). 14) Click OK in the CONFIGURE TEST window to complete the measurement setup. To start the measurement: Click the start icon in the menu bar of CMUgo:
Fig. 3.2.2_9 Start icon in the menu bar of CMUgo
To stop a running measurement:
Click the stop icon in the menu bar of CMUgo:
Fig. 3.2.2_10 Stop icon in the menu bar of CMUgo
Test description and measurement report: When the basic initialization is completed, a pop-up menu instructs you to SWITCH ON THE MOBILE. Ignore this message if it is already powered up. After the individual response time of the mobile station, the CMU200 automatically registers the mobile station and sets up a call connection. The pop-up menu disappears when the call is established. The sequence 1XEVDO_3.2.2_T2-T8.SEQ sets up the channel simulator configuration 3. This simulates one path, and a velocity of 30 km/h. The CMU200 starts the frame error measurement. The minimum measurement time for the requested confidence level of 95 % for Case 1 tests is 30 seconds according to the standard IS-866-A. The resulting minimum number of frames is 9000. For a first orientation, fewer frames could be taken. (In the test sequences, the number of frames is set to 2000). Once the test has been completed, you get a display similar to Fig. 3.2.2_11.
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Fig. 3.2.2_11 Result for demodulation of forward traffic channel in multipath fading channel test.
Measurement values that are inside the limits are displayed in green; those outside the limits are displayed in red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. You see the number of frames, and the actual confidence level that was reached for this measurement. Note: A test result which seems to be inside the limits (e.g. BER = 0%) could be displayed in red colour as failed, if the confidence level specified in the test item could not be reached. This could happen if the number of frames you entered was too low. If your sequence contains more than one test item, each one provides a single test result. The total number of passed and failed tests are counted inside CMUgo and presented by the item TEST END. To repeat a test sequence, click the start button again (Fig. 3.2.2_9). If your mobile station supports more than one band class, change the configurations accordingly and start the test sequence again. 1MA123
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3.3 Receiver Performance 3.3.2 Single Tone Desensitization The single-tone desensitization is a measure of a receiver's ability to receive a 1xEV-DO signal at its assigned frequency in the presence of a single tone spaced at given frequency offsets from the center frequency of the assigned 1xEV-DO channel. A receiver's single-tone desensitization performance is measured by the packet error rate (PER). The purpose of test 3.3.2 is to verify that the PER of the mobile station does not exceed 1 % with 95 % confidence level under these conditions. This test shall be performed for each band class (BC) the mobile station supports, except band class 6. Recommended test setup: Fig. 3.3.2_1 shows the test setup for single-tone desensitization tests. The RF ports of CMU200 Radio Communication Tester and the mobile station under test are connected by means of a 6 dB resistive combiner. During the test, a call is set up to the access terminal (AT) and a connection is established by CMU using this path. In addition, a signal generator is coupled in to provide the single-tone interferer. The resistive combiner ensures a flat frequency response. The 10 dB attenuator in the generator path decouples the instrument and reduces the 1xEV-DO signals at the generator input to a harmless level. Both CMU and signal generator are remote-controlled by CMUgo to run the test automatically. Instruments and accessories:
CMU200, SMU or SMJ or SML
Resistive combiner, frequency response depending on the band class (recommended: Weinschel 1515-1, DC to 12.75 GHz)
AT
Fig. 3.3.2_1 Test setup for single tone desensitization test
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Path loss compensation: Measure the RF cable loss between the AT and CMU200 and between the signal generator and AT. Then proceed as described in chapter CONFIGURE TEST ITEMS 1XEVDO SINGLE TONE DESENSITIZATION. Test procedure: Click LOAD SEQUENCE, and select 1XEVDO 3.3.2 T1-T4.SEQ. The CONFIGURE TEST window looks like Fig. 3.3.2_2: The left-hand column contains all available test items, and the right column shows which test items have been selected to build the sequence for test 3.3.2. In general every CMUgo test sequence starts with a BASIC INITIALIZING of the CMU. It always ends with the item TEST END, which provides a summary result. Each 1xEVDO AT test needs a call connection, which is established by the test item 1XEV-DO CALL SETUP and released by item 1XEV-DO CALL RELEASE. The essential items for test 3.3.2 are therefore the test items between CALL SETUP and CALL RELEASE. With sequence 1XEV-DO_3.3.2 T1-T4.SEQ, four tests are provided as listed in the standard IS-866-A.
Fig. 3.3.2_2 CONFIGURE TEST window. Available and selected test items (test sequence) for single-tone desensitization test.
Test items have to be configured before a test runs. Double-click a test item to open its configuration window. Configure test item BASIC INITIALIZING: See section 3.2.2. Configure test item 1XEVDO CALL SETUP: See section 3.2.2.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test items 1XEVDO SINGLE TONE DESENSITIZATION: Double-click 1XEVDO SINGLE TONE DESENSITIZATION (e.g. Item 1) in the list of the selected test items (see Fig. 3.3.2_3). It provides parameter entry fields for one interfering generator (SMx Signal).
Fig. 3.3.2_3 Setup for 1xEV-DO Single Tone Desensitization (Test 1)
The pull-down list IS-866-A PREDEFINED TESTS offers 4 test items. Depending on the NETWORK (bandclass) and Access Terminal CLASS selection the parameters TONE OFFSET, TONE POWER, PER UPPER LIMIT and MINIMUM CONFIDENCE LEVEL are set according to standard IS-866-A.. 1)
Select your PREDEFINED TEST in accordance with the band class of your AT.
If you modify one of the parameters mentioned above, the USER DEFINED indicator is checked. 2)
Modify these parameters if necessary.
Listed below are some of the remaining parameters:
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3)
Enter a channel number at RF CHANNEL.
4)
Enter the path loss measured between the AT and the CMU200 as CABLE LOSS DL and UL.
5)
Enter the previously measured path loss between the AT and the signal generator as CABLE LOSS in the SMx field.
6)
Enter as AUXILIARY DEVICE NAME the name you specified for the generator's GPIB configuration (see section Configuring the GPIB settings on page 6).
7)
Optionally add a comment.
8)
Click OK to return to the CONFIGURE TEST window (Fig. 3.3.2_2). 22
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Configure another item and create your own sequence, if necessary.
You may want to store your sequence. Use the button SAVE SEQUENCE in the CONFIGURE TEST window (see Fig. 3.5.2_2). 10) Complete the measurement setup by clicking OK in the CONFIGURE TEST window. 11) Click on the START icon in the CMUgo menu bar to start the measurement (see Fig. 3.2.2_9). Test description and measurement report: Once you have clicked the START icon,
the hardware setup is displayed as wallpaper if the item SHOW HINT is present
otherwise a temporary MEASUREMENT REPORT window is displayed.
To optimize the speed, these windows are not updated before the last measurement of the last test item has been finished. The temporary MEASUREMENT REPORT window already shows the names of the tests and the test conditions. However, as long as the tests are running, all test items are indicated as not performed. When the basic initialization is completed, a pop-up menu instructs you to SWITCH ON THE MOBILE. Ignore this message if it is already powered up. After the individual response time of the MS, the CMU200 automatically registers the mobile station and sets up a call connection. The pop-up menu disappears when the call is established. With the predefined sequence 1XEVDO_3.3.2_T1-T4.SEQ, the following measurements are subsequently run: Test 1: The total power of the CMU is set to 102.4 dBm. The tone power (interferer level) is set to 30 dBm. The path losses you entered are compensated automatically. A first PER measurement is performed with an interferer tone offset of +2500 kHz. The result is stored inside CMUgo. Test 2: The test is repeated with the same levels but with a tone offset of 2500 kHz. The result is stored inside CMUgo. Test 3: The test is repeated with a tone power of 40 dBm and a tone offset of +2500 kHz. The result is stored inside CMUgo. Test 4: The test is repeated with a tone power of 40 dBm and a tone offset offset of 2500 kHz. The result is stored inside CMUgo. During the test, the currently executed test item and test step are indicated on the bottom bar of the MEASUREMENT REPORT window. (The test step is an internal count within each test item.) Once all test steps have been completed, the hardware setup display is replaced by the MEASUREMENT REPORT, or the temporary Measurement Report window is updated. For SINGLE-TONE DESENSITIZATION, a display similar to Fig. 3.3.2_4 appears.
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Fig. 3.3.2_4 Test result for single tone desensitization (BC0)
Measurement values below the limits are displayed green; those exceeding the limits red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. Note:
CALL TO MOBILE and CALL RELEASE are treated like the other test items. They increase the number of tests by two as tests without limits.
To repeat a test sequence, click the START button again (Fig. 3.2.2_9). If your mobile station supports more than one band class, change the configurations accordingly and start the test sequence again.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 3.3.3 Intermodulation Spurious Response Attenuation The intermodulation spurious response attenuation is a measure of a receiver's ability to receive a 1xEV-DO signal at its assigned channel frequency in the presence of two interfering CW tones. These tones are separated from the assigned channel frequency and from each other such that the third order mixing of the two interfering CW tones can produce an interfering signal in the band of the desired 1xEV-DO signal. The receiver performance is measured by the packet error rate (PER). The purpose of test 3.3.3 is to verify that the PER of the mobile station does not exceed 1 % with 95 % confidence level under these conditions. This test shall be performed for each band class the mobile station supports. Recommended test setup: Fig. 3.3.3_1 shows the test setup for intermodulation spurious response attenuation. The RF ports of the Radio Communication Tester CMU200 and the AT under test are connected by means of a hybrid combiner. During the test, a call is set up to the mobile station and a connection is established by the CMU using this path. In addition two interfering signals are fed in from two generators. Hybrid combiners are used for this test because of their isolation is better than that of resistive combiners. The hybrids decouple the instruments and make sure that the interferer signals at the CMU RF port are sufficiently low. Thus no additional mixing products can emerge due to non-linear elements inside the CMU. The 10 dB attenuator in the generator's path reduces the 1xEV-DO signals at the generator inputs to a harmless level. The CMU and signal generators are remote-controlled by CMUgo to run the test automatically. Instruments and accessories:
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CMU200 and SMU or SMJ or SML
Hybrid combiners, frequency response depending on the band class (recommended for BC 1: Minicircuits ZFSC-2-2500)
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Path loss compensation: Measure the RF cable loss between the AT and CMU200 and between the signal generators and the AT. Then proceed as described in the following section Configure Test Items 1XEVDO INT.SPUR.RESP.ATTEN.
AT
Fig. 3.3.3_1: Test setup for intermodulation spurious response attenuation.
Test procedure: 1) Connect instruments and mobile station as shown in Fig. 3.3.3_1. 2) Run CMUgo, and then click CONFIGURATION CONFIGURE TESTS. The CONFIGURE TEST window opens. 3) Click LOAD SEQUENCE, and select 1XEVDO_3.3.3_T1-T6.SEQ.
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Fig. 3.3.3_2: Available and selected test items (test sequence) for 1xEV-DO intermodulation spurious response attenuation.
Check Basic Initializing Check whether the correct function group inside the CMU is activated (see Fig. 3.2.2_6). Configure test item 1XEVDO CALL SETUP: Double-click 1XEV-DO CALL SETUP in the list of the selected test items (see section 3.2.2). Configure test items 1xEVDO INT.SPUR.RESP.ATTEN: Double-click 1XEV-DO INT. SPUR. RESP. ATTEN. in the list of the selected test items. The window 1XEV-DO INTERMODULATION SPURIOUS RESPONSE ATTENUATION appears (see Fig. 3.3.3_3). It provides parameter entry fields for two interfering generators (SMX SIGNAL).
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Fig. 3.3.3_3: Setup for 1xEV-DO intermodulation spurious response attenuation test 1
The pull-down list IS-866-A PREDEFINED TESTS offers 6 available tests named in the specification. The test number, Band Class and AT Class affect the SMx parameters TONE OFFSET and TONE POWER., MINimum CONFidence LEVEL and UPPER PER LIMIT. 1)
Select your PREDEFINED TEST for this test item.
2)
Modify the parameters named above if necessary.
Listed below are some of the remaining parameters: 3)
Enter a channel number at RF CHANNEL.
4)
Enter the previously measured path loss between the AT and the CMU200 as CABLE LOSS DL and UL.
5)
Enter the previously measured path loss between the AT and the signal generators as CABLE LOSS 1 and 2 in the SMx fields.
6)
Enter as AUXILIARY DEVICE NAMES the names you specified for the generator's GPIB configuration (see section Configuring the GPIB settings on page 6).
7)
Optionally add a comment.
After clicking OK you return to the CONFIGURE TEST window (Fig. 3.3.3_2). 8)
Configure another item and create your own sequence, if necessary.
You may want to store your sequence. Use the button SAVE SEQUENCE in the CONFIGURE TEST window (see Fig. 3.3.3_2). 9)
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Click OK in the CONFIGURE TEST window to complete the measurement setup. 28
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To start the measurement: Click the START icon in the menu bar of CMUgo (see Fig. 3.2.2_9). Test description and measurement report: When the BASIC INITIALIZATION is completed, a pop-up menu instructs you to SWITCH ON THE MOBILE. Ignore this message if it is already powered up. After the individual response time of the AT, the CMU200 automatically registers the mobile station and sets up a call connection. The pop-up menu disappears when the call is established. With the predefined sequence 1XEVDO_3.3.3_T1-T6.SEQ, Tes t1 to Test 6 with BC0 and AT Class 1 are subsequently run. After all test steps have been completed, the following or similar Measurement Report is displayed (see Fig. 3.3.3_7)
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Fig. 3.3.3_4: Test result for intermodulation spurious response attenuation.
Measurement values below the limits are displayed green, those exceeding the limits red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. To repeat a test sequence, click the start button again (Fig. 3.2.2_9). If your mobile station supports more than one band class, change the configurations accordingly and start the test sequence again.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 3.3.4 Adjacent Channel Selectivity Adjacent channel selectivity is a measure of a receiver's ability to receive a 1xEV-DO signal at its assigned frequency in the presence of another 1xEVDO signal that is offset from the center frequency of the assigned channel by +/ 2.5 MHz (for SR 1). The adjacent channel selectivity is measured by the packet error rate (PER). The purpose of test 3.3.4 is to verify that the PER of the mobile station does not exceed 1 % with 95 % confidence level under these conditions. This test is applicable to BC 6 mobile stations only. Recommended test setup: Fig. 3.3.4_1 shows the test setup for the adjacent channel selectivity test. It is the same setup that is used for test 3.3.2. The RF ports of the Radio Communication Tester CMU200 and the AT under test are connected by means of a resistive combiner. During the test, a call is set up to the mobile station and a connection is established by the CMU using this path. In addition, a signal generator is coupled in to provide the adjacent channel interferer. The resistive combiner ensures a flat frequency response. The 10 dB attenuator in the generator path decouples the instrument and reduces the 1xEV-DO signals at the generator output to a harmless level. Both the CMU and the signal generator are remote-controlled by CMUgo to run the test automatically.
AT
Fig. 3.3.4_1: Test setup for adjacent channel selectivity test
Instruments and accessories:
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CMU200 and SMU or SMJ or SML
Resistive combiner, frequency response depending on the band class (recommended: Weinschel 1515-1, DC to 12.75 GHz)
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Path loss compensation: Measure the RF cable loss between the AT and CMU200 and between the signal generator and the AT. Then proceed as described in the following section CONFIGURE TEST ITEMS 1XEVDO ADJ. CHAN. SELECTIVITY. Test procedure: 1) Connect instruments and mobile station as shown in Fig. 3.3.4_1. 2) Run CMUgo and click CONFIGURATION CONFIGURE TESTS. The CONFIGURE TEST window opens. 3) Click LOAD SEQUENCE and select 1XEVDO_3.3.4_T1-T2.SEQ.
Fig. 3.3.4_2: Available and selected test items (test sequence) for adjacent channel selectivity.
Check BASIC INITIALIZING Check whether the 1xEVDO function group is activated (see Fig. 3.2.2_6). Configure test item 1XEVDO 2000 CALL SETUP: 1)
Double-click 1XEVDO CALL SETUP in the list of the selected test items.
Configure test item 1XEVDO CALL SETUP: Double-click 1XEV-DO CALL SETUP in the list of the selected test items (see section 3.2.2). The adjacent channel selectivity test is applicable to BC 6 mobile stations only.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test item 1XEV-DO ADJACENT CHANNEL SELECTIVITY: 1)
Double-click 1XEV-DO ADJ.CHAN.SELECTIVITY / TEST 1 in the list of the selected test items.
The window 1XEV-DO ADJACENT CHANNEL SELECTIVITY configuration appears (see Fig. 3.3.4_3).
Fig. 3.3.4_3: Setup for 1xEV-DO adjacent channel selectivity / Test 1
Opening the pull-down list IS-866-A PREDEFINED TESTS shows the available tests (see Fig. 3.3.4_4):
Fig. 3.3.4_4: Predefined tests for 1xEV-DO adjacent channel selectivity.
Test 1 uses a positive channel offset (interferer above assigned channel); test 2 uses a negative channel offset. Predefined parameters are CMU Level (Ior) and interferer CHANNEL POWER, CHANNEL OFFSET, UPPER PER LIMIT, MINIMUM CONFIDENCE LEVEL, and MAX. TEST PACKETS. If one of these entries is modified, the USER DEFINED control is checked. 2)
Select your test.
3)
Modify parameters if necessary.
Listed below are some of the remaining parameters:
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4)
Enter a channel number at Physical RF Channel.
5)
Enter the path loss you measured between the AT and the CMU200 as CABLE LOSS DL and CABLE LOSS UL.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 6)
Enter the path loss you measured between the AT and the signal generator as CABLE LOSS in the INTERFERER SIGNAL field.
7)
Enter as AUX DEVICE NAME the name you specified for the generator's GPIB configuration (see section Configuring the GPIB settings on page 6).
8)
Optionally add a comment.
9)
Click OK.
You are back in the CONFIGURE TEST window (Fig. 3.3.4_2). 10) Configure another item and create your own sequence, if necessary. You may want to store your sequence. Use the button SAVE SEQUENCE in the CONFIGURE TEST window (see Fig. 3.2.2_5). 11) Click OK in the CONFIGURE TEST window to complete the measurement setup. To start the measurement:
Click the start icon in the menu bar of CMUgo (see Fig. 3.2.2_9).
Test description and measurement report: When the basic initialization is completed, a pop-up menu instructs you to SWITCH ON THE MOBILE. Ignore this message if it is already powered up. After the individual response time of the AT, the CMU200 automatically registers the mobile station and sets up a call connection. The pop-up menu disappears when the call is established. With the predefined sequence 1XEVDO_3.3.4_T1-T2.SEQ, the two following measurements are subsequently run : Test 1: The total power of the CMU is set to 102.4 dB and 1xEV-DO interferer channel power is set to 37 dBm. The entered path losses are compensated automatically. A PER measurement is performed with an interferer frequency offset of +2.5 MHz. The result is stored inside CMUgo. Test 2: The test is repeated with the same levels but with a channel offset of 2.5 MHz. The result is stored inside CMUgo.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Once all test steps have been completed, you get a display similar to Fig. 3.3.4_6.
Fig. 3.3.4_5: Test result for adjacent channel selectivity.
Measurement values that are below the limits are displayed in green; those which exceed the limits are displayed in red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. To repeat a test sequence, click the start button again (Fig. 3.2.2_6).
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 3.3.5 Receiver Blocking Characteristics The receiver blocking characteristics test is a measure of a receiver's ability ® to receive a CDMA2000 1xEV-DO signal at its assigned frequency in the presence of a single tone at frequencies other than those of the adjacent channels, without this unwanted signal causing a degradation of the performance of the receiver beyond a specific limit. A receiver's blocking performance is measured by the packet error rate (PER). The purpose of test 3.3.5 is to verify that the PER of the mobile station does not exceed 1% with 95% confidence level under these conditions. This test is applicable to BC6 acces terminals stations only. Recommended test setup: Fig. 3.3.5_1 shows the test setup for the receiver blocking test. It is the same setup that is used for test 3.5.2 and 3.5.4. The RF ports of Radio Communication Tester CMU200 and the AT under test are connected by means of a resistive combiner. During the test, a call is set up to the mobile station and a connection is established by the CMU using this path. In addition, a signal generator is coupled in to provide the blocking interferer. The resistive combiner ensures a flat frequency response. The 10 dB attenuator in the generator path decouples the instrument and reduces the 1xEV-DO signals at the generator input to a harmless level. Both the CMU and the signal generator are remote-controlled by CMUgo to run the test automatically.
AT
Fig. 3.3.5_1: Test setup for receiver blocking test.
Seven RX blocking tests can be found in section 3.3.5 of the standard IS866-A. Tests 1 to 4 are in-band-tests. Here the interfering signal occurs each time at a fixed frequency offset from the assigned channel (inside the 1xEV-DO band). These tests are performed using predefined tests 1 to 4 of 1XEV-DO BLOCKING TESTS. The interferers of tests 5 to 7 use frequencies outside the 1xEV-DO band. They are not based on only one measurement: The interferer is subsequently applied at all frequencies of a 1 MHz grid between the lower and the upper end of specified frequency bands.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Check Basic Initializing Check whether the 1xEVDO function group is activated (see Fig. 3.2.2_6). In-Band Blocking: Instruments and accessories:
CMU200 and SMU or SMJ or SML
Resistive combiner (e.g. Weinschel 1515-1, DC to 12.75 GHz)
Path loss compensation:
Measure the path loss between the AT and the CMU200 and between the AT and the signal generator and proceed as described in the following section Configure test item 1XEVDO CALL SETUP.
Test procedure: 1)
Connect instruments and AT as shown in Fig. 3.3.5_1.
2)
Run CMUgo, then click CONFIGURATION CONFIGURE TESTS to open the CONFIGURE TEST window.
3)
Click LOAD SEQUENCE, and select 1XEVDO_3.3.5_T1-T7.SEQ.
Fig. 3.5.5_2: Test sequence for in- and out-of-band blocking tests.
Configure test item 1XEVDO CALL SETUP: 1)
Double-click 1XEVDO CALL SETUP in the list of the selected test items.
Configure test item 1XEVDO CALL SETUP: Double-click 1XEV-DO CALL SETUP in the list of the selected test items (see section 3.2.2).
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test items 1XEV-DO BLOCKING 1-4 ( In-Band): 1)
Double-click 1XEVDO RECEIVER BLOCKING CHARACTERISTICS / TEST 1 (IN-BAND) in the list of selected test items.
The window 1XEV-DO RECEIVER BLOCKING CHARACTERISTICS appears (see Fig. 3.3.5_3).
Fig. 3.3.5_3: Setup for 1xEV-DO in-band blocking / test 1
Opening the pull-down list IS-866-A PREDEFINED TESTS shows the available tests (see Fig. 3.3.5_4):
Fig. 3.3.5_4: Predefined tests for 1xEV-DO in- an out-of-band blocking characteristics.
For each in-band test, the following parameters are predefined: IOR (CMU Level), the CW TONE OFFSET, CW TONE POWER, UPPER PER LIMIT, MIN. CONFIDENCE LEVEL and MAX. TEST PACKETS. If one of these entries is modified, the USER DEFINED indicator is checked.
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2)
Select your test.
3)
Modify parameters if necessary.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Listed below are some of the remaining parameters: 4)
Enter a channel number at RF CHANNEL.
5)
Enter the path loss you measured between the AT and the CMU200 as CABLE LOSS DL and CABLE LOSS UL.
6)
Enter the path loss you measured between the AT and the signal generator as CABLE LOSS in the SMX SIGNAL field.
7)
Enter as AUX DEVICE NAME the name you specified for the generator's GPIB configuration (see section Configuring the GPIB Settings).
8)
Add a comment if you like.
9)
Click OK.
You are back in the CONFIGURE TEST window (Fig. 3.3.5_2). To start the measurement:
Click the start icon in the menu bar of CMUgo (see Fig. 3.2.2_9).
Test description and measurement report: When the basic initialization is completed, a pop-up menu instructs you to Switch on the Mobile. Ignore this message if it is already powered up. After the individual response time of the MS, the CMU200 automatically registers the mobile station and sets up a call connection. The pop-up menu disappears when the call is established. With the predefined sequence 1XEVDO_3.3.5_T1-T7.SEQ, the following measurements are subsequently run: The total power of the CMU is set to 101 dB, and Pilot and Traffic power are set to 7 db and 15.6 dB respectively. The CDMA interferer level is set to 56 dBm for tests 1 and 2, and to 44 dBm for tests 3 and 4. The path losses you entered are compensated automatically. FER measurements are performed with the interferer frequency offset as specified in the test items. The result is stored inside CMUgo. Once all test steps have been completed, you get a display similar to Fig. 3.3.5_5.
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Fig. 3.3.5_5: Measurement report for blocking tests 1 to 4 (In Band) and 5 to 7 (Out of Band).
Measurement values that are below the limits are displayed in green; those which exceed the limits are displayed in red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. Unlike the in-band tests 1 to 4 the out-of-band tests 5 to 7 are not based on only one measurement: The interferer is subsequently applied at all frequencies between the lower and the upper end of specified frequency bands in 1 MHz steps. Apart from that, there are no differences to the inband-blocking tests. Notes:
For the higher frequencies of test 7, you need the SMR signal generator. We recommend splitting this test into several measurements with smaller frequency sections than the two wide frequency sections specified by the standard. For the smaller sections you can enter a more precise attenuation.
Due to the large number of FER measurements the test duration is considerable long. To stop a running measurement: see section 3.2.2. 1MA123
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3.4 Limitations on Emissions 3.4.1 RX Conducted Spurious Emissions RX conducted spurious emissions are spurious emissions generated or amplified in the mobile station's receiver that appear at the mobile station antenna connector. There is no forward or reverse 1xEV-DO channel active during this test. The conducted spurious emissions are measured with a spectrum analyzer connected to the mobile station's antenna port. The purpose of test 3.4.1 is to verify that the emissions of the mobile station do not exceed a specific set of limits. This test is performed for each band class the mobile stations supports. Recommended test setup: Fig. 3.4.1_1 shows the test setup for test RX conducted spurious emissions. The RF ports of the mobile station and the analyzer are simply connected to each other. There is no call setup or radio connection established between the CMU and the mobile station. Nevertheless, the CMU is needed to start program CMUgo. The spurious emission measurements are made automatically, remotely controlled by CMUgo.
AT
Fig. 3.4.1_1: Test setup for RX spurious emission test.
Test 3.4.1 contains in-band (RX / TX) and out-of band measurements. Notes:
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In the RX band very low emissions are measured. This requires high sensitive test equipment and good shielding. The RF attenuation of the analyzer is set to 0 dB for this tests.
To avoid overloading the analyzer make sure that the DUT does not transmit during the test.
Use a shielded chamber for the DUT (e.g. CMU-Z11).
Use well shielded cables.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Instruments and accessories:
CMU200
FSQ or FSU or FSP or FSL with preamplifier FSL-B22.
Path loss compensation: (see previous section)
Measure the path loss between the AT and the spectrum analyzer
Test procedure: 1)
Connect the analyzer and the mobile station as shown in Fig. 3.4.1_1.
2)
Run CMUgo, and then click CONFIGURATION CONFIGURE TESTS.
The CONFIGURE TEST window opens. 3)
Click LOAD SEQUENCE and select 1XEVDO_3.4.1.SEQ.
Fig. 3.4.1_2: Available and selected test items (test sequence) for RX spurious emission test.
For each band class, the standard IS-866-A provides a set of limits for various frequency ranges such as the receive band, the transmit band and outof-band sections. The sequence 1XEVDO_3.4.1.SEQ contains the test item 1XEVDO RX SPURIOUS EMISSIONS for in-band and out-of-band measurements.
in-band
below the TX band
between the TX and RX bands, and
above the RX band.
There is no Call Setup, no Call Connection, no Forward or Reverse signal present during this test. Nevertheless, CMUgo does not start without the BASIC INITIALIZING, which requires that the CMU200 is connected to the GPIB port.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test item 1xEVDO RX SPURIOUS EMISSIONS: 1)
Double-click 1XEVDO RX SPURIOUS EMISSIONS in the list of the selected test items.
The window 1XEV-DO RX CONDUCTED SPURIOUS EMISSIONS appears (see Fig. 3.4.1_3).
Fig. 3.4.1_3: Setup for 1xEV-DO RX conducted spurious emissions
The in-band window defines the spurious emissions in the RX as well as in the TX band. Opening the pull-down list IS-866-A BAND CLASS shows you the available band classes (see Fig. 3.4.1_4):
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Fig. 3.4.1_4: Predefined in-band tests for 1xEV-DO RX conducted spurious emissions.
For BC3, BC5, BC10, and BC11, the RX and TX bands are not continuous but have gaps. Consequently you can select In-Band and/or Out-of-Band. Predefined parameters are the LOWER and UPPER frequencies, the RBW, and the LIMITS. If you modify one of these entries, the selection changes to USER DEFINED. 2)
Select your test.
3)
Modify parameters if necessary.
Listed below are some of the remaining parameters: 1)
Enter the path loss you measured between the AT and the spectrum analyzer as ANALYZER INPUT ATTENUATION.
2)
Enter as AUXILIARY DEVICE NAME the name you specified for the analyzer's GPIB configuration (see section Configuring the GPIB settings on page 6).
3)
Add a DESCRIPTION if you like.
4)
Click OK.
You are back in the CONFIGURE TEST window (Fig. 3.4.1_2). 5)
Configure the next test item.
6)
If necessary, create your own sequence.
You may want to store your sequence. Use the button SAVE SEQUENCE in the CONFIGURE TEST window (see Fig. 3.4.1_2). 7)
Finally click OK (in the CONFIGURE TEST window).
This completes the measurement setup. To start the measurement: 1MA123
Click the start icon in the menu bar of CMUgo (see Fig. 3.5.2_9). 44
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Test description and measurement report: When the basic initialization is completed, the specified sections of the spectrum are scanned one after the other. For each section scanned, the maximum measured value is stored in CMUgo. Once all steps have been completed, you get a display similar to Fig. 3.4.1_5.
Fig. 3.4.1_5: Test result for 1xEV-DO RX conducted spurious emissions.
The report screen displays the maximum emission and the frequency at which the maximum has been detected. Measurement values that are below the limits are displayed in green; those which exceed the limits are displayed in red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. To repeat a test sequence, click the start button again (Fig. 3.5.2_9). If your access terminal supports more than one band class, change the item configurations accordingly and start the test sequence again.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals
4 Physical Layer Transmitter Minimum Standards 4.4 Limitations on Emissions 4.4.1 TX Conducted Spurious Emissions TX conducted spurious emissions are spurious emissions at frequencies ® that are outside the assigned CDMA2000 1xEV-DO channel. The emissions are measured during continuous TX transmission with a spectrum analyzer connected to the mobile station antenna port. The purpose of test 4.4.1 is to verify that the emissions of the mobile station do not exceed a specific set of limits. This test is performed for each band class the mobile stations supports. Recommended test setup: Fig. 4.4.1_1 shows the test setup for the TX conducted spurious emissions. The RF ports of the Radio Communication Tester CMU200 and the mobile station under test are connected by means of a resistive combiner. During the test, a call is set up to the mobile station and a connection is established by CMU using this path. In addition, a spectrum analyzer is coupled in to measure the spurious emissions. The resistive combiner ensures a flat frequency response. The notch filter prevents the TX carrier to overdrive the spectrum analyzer input. Both the CMU and the spectrum analyzer are remote-controlled by CMUgo to run the test automatically.
AT Notch Filter at TX frequency Notchfilter f0 = TX freq
Fig. 4.4.1_1: Test setup for TX conducted spurious emission test
Instruments and accessories:
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CMU200, FSQ, FSU, FSP or FSL
Resistive combiner (recommended: Weinschel 1515-1, DC to 12.75 GHz)
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Path loss compensation: (see previous section)
Measure the path loss between the AT and the CMU200
Measure the path loss between the AT and the spectrum analyzer
Test procedure: 1)
Connect instruments and mobile station as shown in Fig. 4.4.1_1.
2)
Run CMUGO, and then click CONFIGURATION CONFIGURE TESTS.
The CONFIGURE TEST window opens. 3)
Click LOAD SEQUENCE, and select 1XEVDO_4.4.1_BC0.SEQ.
Fig. 4.4.1_2: Available and selected test items (test sequence) for TX conducted spurious emissions.
The sequence 1XEVDO_4.4.1_BC0.SEQ contains as an example the test suite in accordance with the IS-866-A specification. The test item 1XEVDO TX CONDUCTED SPURIOUS EMISSIONS causes the CMU to continuously send '0' power control bits to the mobile station. This sets the mobile station's output power to maximum. Check Basic Initializing Check whether the 1xEVDO function group is activated (see Fig. 3.2.2_6). Configure test item 1xEVDO Call Setup: 1)
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Double-click 1XEVDO 2000 CALL SETUP in the list of the selected test items.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals The window CALL SETUP CONFIGURATION opens.
Fig. 4.4.1_3: Call setup configuration for TX Conducted Spurious Emissions test.
2)
Select the NETWORK STANDARD and RELEASE of the AT.
3)
Enter the desired RF CHANNEL, TXLEVEL and FORWARD PACKET ACTIVITY.
4)
Enter the path loss you measured between the AT and the CMU200 as INPUT ATTENUATION and OUTPUT ATTENUATION.
You may modify the other parameters if necessary. 5)
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Click OK to return to the CONFIGURE TEST window (Fig. 4.4.1_2).
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test items 1XEVDO TX CONDUCTED SPURIOUS EMISSIONS: 1) Double-click 1XEVDO TX CONDUCTED SPURIOUS EMISSIONS in the list of selected test items. The window 1XEVDO TX CONDUCTED SPURIOUS EMISSIONS appears (see Fig. 4.4.1_4).
Fig. 4.4.1_4: Setup example for 1xEV-DO TX conducted spurious emissions.
Depending on BAND CLASS and ITU CATEGORY the parameters FMIN, FMAX, RBW and LIMIT are changed according to the IS-866-A specification. In case one or more these parameters are modified the USER DEFINED indicator is checked. Listed below are some of the remaining parameters: 2) TX LEVEL – specified AT output RF level. 3) CMU ATTEN – compensates level loss from CMU to AT. 4) FSX ATTEN – compensates level loss from AT to analyzer. 5) AUX DEVICE – Auxilliary Device of the analyzer need by CMUgo. 6) Add a DESCRIPTION if you like. 7) Click OK to return to the CONFIGURE TEST window (Fig. 4.4.1_2). 8) Configure the next test item, e.g. BC2. 9) If necessary, create your own sequence. You may want to store your sequence. Use the button SAVE SEQUENCE in the CONFIGURE TEST window (see Fig. 4.4.1_2). 10) Finally click OK (in the CONFIGURE TEST window) to complete the measurement setup. 1MA123
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Additional Tests on CDMA2000 1xEV-DO Access Terminals To start the measurement:
Click the start icon in the menu bar of CMUgo (see Fig. 3.5.2_7).
Test description and measurement report: When the basic initialization is completed, the specified sections of the spectrum are scanned one after the other. For each section scanned, the maximum measured value is stored in CMUgo. Once all test steps have been completed, you get a display similar to Fig. 4.4.1_5.
Fig. 4.4.1_5: Test result for TX conducted spurious emissions.
Measurement values that are below the limits are displayed in green; those which exceed the limits are displayed in red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. To repeat a test sequence, click the start button again (Fig. 3.5.2_9). If your mobile station supports more than one band class, change the configurations accordingly and start the test sequence again.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals 4.4.3 Occupied Bandwidth The occupied bandwidth (OBW) is defined as the frequency range, where the fractions of the total radiated power of a modulated carrier above and below the edge frequency are 0.5 % each, averaged over the frequency. The occupied bandwidth is measured directly by the OBW procedure of the analyzer's firmware. The purpose of test 4.4.3 is to verify that the OBW of the mobile station does not exceed 1.48 MHz for SR 1, nor 4.6 MHz for SR 3. This test is applicable to BC 3 and 6 mobile stations only. Recommended test setup: Fig. 4.4.3_1 shows the test setup for the occupied bandwidth test. It is the same setup that is used for test 4.4.1. The RF ports of the Radio Communication Tester CMU200 and the mobile station under test are connected by means of a resistive combiner. During the test, a call is set up to the mobile station and a connection is established by the CMU using this path. In addition, a spectrum analyzer is coupled in to measure the OBW. The resistive combiner ensures a flat frequency response. Both the CMU and the spectrum analyzer are remote-controlled by CMUgo to run the test automatically. Instruments and accessories:
CMU200, FSQ, FSU, or FSP, or FSL
Resistive combiner (recommended: Weinschel 1515-1, DC to 12.75 GHz)
Path loss compensation: (see previous section)
Measure the path loss between the AT and the CMU200
Measure the path loss between the AT and the spectrum analyzer
AT
Fig. 4.4.3_1: Test setup for occupied bandwidth test.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Test procedure: 1)
Connect instruments and mobile station as shown in Fig. 4.4.3_1.
2)
Run CMUgo, and then click Configuration, Configure Tests.
The Configure Test window opens. 3)
Click Load Sequence, and select CDMA2000_4.4.3.seq.
Fig. 4.4.3_2: Available and selected test items (test sequence) for occupied bandwidth.
Check Basic Initializing Check the 1xEV-DO The predefined sequence uses BC3. If you work with BC6, activate 1xEV-DO IMT2K Band (see table 4.4.3_3).
BC3
1xEV-DO Cellular Band
CMU-K849 option
BC6
1xEV-DO IMT2K Band
CMU-K869 option
Table 4.4.3_1: Band classes and function groups.
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test item 1XEVDO CALL SETUP: 1)
Double-click 1XEVDO CALL SETUP in the list of the selected test items.
The window 1XEVDO CALL SETUP opens.
Fig. 4.4.3_3: Call setup configuration for occupied bandwidth.
The occupied bandwidth test is applicable to BC 3 or BC 6 mobile stations only. 2)
Select your band class at NETWORK STANDARD.
3)
Select the FORWARD PACKET ACTIVITY as specified.
4)
Select the LAYER Subtype 0 or 1.
5)
Enter a channel number for the call setup at PHYSICAL RF CHANNEL.
6)
Enter the path loss you measured between the AT and the CMU200 as INPUT ATTENUATION and OUTPUT ATTENUATION.
Modify the other parameters if necessary. 7)
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Click OK to return to the CONFIGURE TEST window (Fig. 4.4.3_2):
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Configure test item 1XEVDO OCCUPIED BANDWIDTH: 1)
Double-click 1XEVDO OCCUPIED BANDWIDTH in the list of the selected test items.
The window 1XEVDO OCCUPIED BANDWIDTH CONFIGURATION appears (see Fig. 4.4.3_4).
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Fig. 4.4.3_4: Setup for CDMA2000 1xEV-DO occupied bandwidth test.
1)
Enter a channel number at PHYSICAL RF CHANNEL.
2)
Enter the path loss you measured between the AT and the CMU200 as INPUT and OUTPUT ATTENUATIONS.
3)
Enter the path loss you measured between the AT and the analyzer as INPUT ATTENUATION in the Analyzer field.
4)
Enter as AUXILIARY DEVICE NAME the name you specified for the generator's GPIB configuration (see section CONFIGURING THE GPIB SETTINGS on page 6).
5)
Add a DESCRIPTION if you like.
6)
Click OK to return to the CONFIGURE TEST window (Fig. 4.4.3_2).
7)
Configure another item. If necessary, create your own sequence.
You may want to store your sequence. Use the button SAVE SEQUENCE in the CONFIGURE TEST window (see Fig. 4.4.3_2). 8)
Clicking OK (in the CONFIGURE TEST window) completes the measurement setup.
To start the measurement:
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Click the start icon in the menu bar of CMUgo (see Fig. 3.5.2_7).
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Additional Tests on CDMA2000 1xEV-DO Access Terminals Test description and measurement report: When the basic initialization is completed, a pop-up menu instructs you to SWITCH ON THE MOBILE. Ignore this message if it is already powered up. After the individual response time of the AT, the CMU200 automatically registers the mobile station and sets up a call connection. The pop-up menu disappears when the call is established. Then the analyzer is set to the center frequency of the assigned channel, and the section that contains 99 % of the total power is evaluated. You get a display similar to Fig. 4.4.3_5.
Fig. 4.4.3_5: Test result for occupied bandwidth
Measurement values that are below the limits are displayed in green; those which exceed the limits are displayed in red. In addition, the right-hand column (P/F, for Pass/Fail) indicates whether a test was passed or failed. To repeat a test sequence, click the start button again (Fig. 3.2.2_9).
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Additional Tests on CDMA2000 1xEV-DO Access Terminals
5 Summary The program CMUgo has been enhanced by adding new test items for the ® CDMA2000 1xEV-DO standard IS-866-A. For seven tests of IS-866-A predefined test sequences are included to provide a basic parameter setting which can easily be adapted to an individual test scenario. These tests use the Radio Communication Tester CMU200 together with other instruments such as signal generators and spectrum analyzers. For each of the tests mentioned above, the Application Note 1MA123 gives a short overview of the test itself, a recommended hardware setup, predefined test sequences, and step-by-step instructions on how to perform this test using the CMUgo software, and, finally, measurement results obtained with these predefined sequences. For comments and suggestions to this Application Note, please contact TM-Applications@ rohde-schwarz.com.
6 References
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[1]
Recommended Minimum Performance Standards for cdma2000 High Rate Packet Data Access Terminal, IS-866-A
[2]
Additional Tests on CDMA200 Mobile Stations in Accordance with Standard TIA-98, Application Note 1MA86, Rohde & Schwarz, 2006
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Additional Tests on CDMA2000 1xEV-DO Access Terminals
7 Ordering Information Universal Radio Communication Testers ® R&S CMU200 ® 1xEV-DO Signalling Module R&S CMU-B83v22 ® 1xEV-DO Signalling Module R&S CMU-B89 ®
1xEV-DO Signalling, 450 MHz Band 1xEV-DO Signalling, Cellular Band 1xEV-DO Signalling, PCS Band 1xEV-DO Signalling, IMT-2000 Band
1200.8300.02 1200.8400.02 1200.8500.02 1200.8600.02
1xEV-DO Signalling, all bands
1200.8600.02
R&S CMU-B171) ® R&S CMU-Z10 ® R&S CMU-Z11
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I/Q-IF Interface Antenna Coupler for Mobile Phones Shielded Cover for CMU-Z10
1100.6906.02 1150.0801.10 1150.1008.02
Vector Signal Generators ® R&S SMU200A ® R&S SMU-B10x ® R&S SMU-B131) ® R&S SMU-B141) ® R&S SMU-B151) ® R&S SMJ100A ® R&S SMJ-B10x
Vector Signal Generator RF Path A: 100 kHz to 6 GHz Baseband Main Module Fading Simulator (SMU-B13 required) Fading Simulator extension (AMU-B14 requ.) Vector Signal Generator Frequency Range 100 kHz to 6 GHz
1141.2005.02 1141.8x03.02 1141.8003.04 1160.1800.02 1160.2288.02 1403.4507.02 1403.8x02.02
Fading Simulators ® R&S AMU200A1) ® R&S AMU-B131) ® R&S AMU-B141) ® R&S AMU-B151)
Baseband Signal Generator Baseband main module (factory fit only) Fading Simulator (AMU-B13 required) Fading Simulator extension (AMU-B14 requ.)
1402.4090.02 1402.5500.02 1402.5600.02 1402.5700.02
Signal Generators ® R&S SMR20 ® R&S SMR-B11 ® R&S SMP02 ® R&S SMP-B11 ® R&S SML0x
1 GHz to 20 GHz 0.01 GHz to 1 GHz 2 GHz to 20 GHz 0.01 GHz to 1 GHz 9 kHz to 2.2 GHz
1104.0002.20 1104.4250.02 1035.5005.02 1036.6240.02 1090.3000.1x
R&S CMU-K839 ® R&S CMU-K849 ® R&S CMU-K859 ® R&S CMU-K869 or ® R&S CMU-PK800
Signal Analyzers, Spectrum Analyzers and Options ® 9 kHz to 40 GHz R&S FSPxx ® 20 Hz to 26,5 GHz R&S FSQxx ® 20 Hz to 46 GHz R&S FSUxx ® 20 Hz to 50 GHz R&S FSMRxx ® Spectrum Analyzer 6 GHz R&S FSLx ® RF Preamplifier R&S FSL-B22 1xEV-DO mobile station test application ® R&S FSQ-K852) firmware for FSMR, FSP, FSQ, FSU 1) 2)
1100.0008.02 1150.0301.xx 1159.3090.02
1093.4495.xx 1155.5001.xx 1166.1660.xx 1166.33.11.xx 1300.2502.0x 1300.5953.02 1300.6689.02
required for 3.3.2 Multipath Fading test. required for 4.4.3 Occupied Bandwidth test
ROHDE & SCHWARZ GmbH & Co. KG . Mühldorfstraße 15 . D-81671 München . P.O.B 80 14 69 . D-81614 München Telephone +49 89 4129 -0 . Fax +49 89 4129 - 13777 . Internet: http://www.rohde-schwarz.com
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This Application Note and the supplied programs may be used only in accordance with the conditions of use set forth in the download area of the Rohde & Schwarz website. 1MA123
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